updated SCF azure sample

spring-cloud-function-samples/function-azure-di-samples/azure-httptrigger-demo/src/main/java/com/example/azure/di/httptriggerdemo/HttpTriggerDemoApplication.java

@@ -35,6 +35,11 @@ public class HttpTriggerDemoApplication {
 		return payload -> payload.toUpperCase();
 	}
 
+	@Bean
+	public Function<String, String> reverse() {
+		return payload -> new StringBuilder(payload).reverse().toString();
+	}
+
 	public static void main(String[] args) {
 		SpringApplication.run(HttpTriggerDemoApplication.class, args);
 	}

spring-cloud-function-samples/function-azure-di-samples/azure-httptrigger-demo/src/main/java/com/example/azure/di/httptriggerdemo/MyAzureFunction.java

@@ -27,23 +27,48 @@ import com.microsoft.azure.functions.annotation.FunctionName;
 import com.microsoft.azure.functions.annotation.HttpTrigger;
 
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cloud.function.context.FunctionCatalog;
 import org.springframework.stereotype.Component;
 
 @Component
 public class MyAzureFunction {
 
+    /**
+     * Plain Spring bean (not Spring Cloud Functions!)
+     */
     @Autowired
     private Function<String, String> echo;
 
+    /**
+     * Plain Spring bean (not Spring Cloud Functions!)
+     */
     @Autowired
     private Function<String, String> uppercase;
 
-    @FunctionName("ditest")
-    public String execute(
+    /**
+     * The FunctionCatalog leverages the Spring Cloud Function framework.
+     */
+    @Autowired
+    private FunctionCatalog functionCatalog;
+
+    @FunctionName("bean")
+    public String plainBeans(
             @HttpTrigger(name = "req", methods = { HttpMethod.GET,
                     HttpMethod.POST }, authLevel = AuthorizationLevel.ANONYMOUS) HttpRequestMessage<Optional<String>> request,
             ExecutionContext context) {
 
         return echo.andThen(uppercase).apply(request.getBody().get());
     }
+
+    @FunctionName("scf")
+    public String springCloudFunction(
+            @HttpTrigger(name = "req", methods = { HttpMethod.GET,
+                    HttpMethod.POST }, authLevel = AuthorizationLevel.ANONYMOUS) HttpRequestMessage<Optional<String>> request,
+            ExecutionContext context) {
+
+        // Use SCF composition. Composed functions are not just spring beans but SCF such.
+        Function composed = this.functionCatalog.lookup("echo|reverse|uppercase");
+
+        return (String) composed.apply(request.getBody().get());
+    }
 }